tap / space
Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Latin quadruplex (“fourfold, quadruple”), from quattuor (“four”) + plico (“fold”). By surface analysis, quadru- + -plex.
quadruple, quadruplicate, fourfold, four-fold
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tap / space
Classic usage
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